EP2251960B1 - Tête de bobine pour une machine électrique et procédé de sa fabrication - Google Patents

Tête de bobine pour une machine électrique et procédé de sa fabrication Download PDF

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Publication number
EP2251960B1
EP2251960B1 EP10161638.1A EP10161638A EP2251960B1 EP 2251960 B1 EP2251960 B1 EP 2251960B1 EP 10161638 A EP10161638 A EP 10161638A EP 2251960 B1 EP2251960 B1 EP 2251960B1
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EP
European Patent Office
Prior art keywords
pin
connection
end winding
phase
phase connection
Prior art date
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Active
Application number
EP10161638.1A
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German (de)
English (en)
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EP2251960A2 (fr
EP2251960A3 (fr
Inventor
Matthias Bänziger
Daniel Hediger
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General Electric Technology GmbH
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General Electric Technology GmbH
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Publication of EP2251960A2 publication Critical patent/EP2251960A2/fr
Publication of EP2251960A3 publication Critical patent/EP2251960A3/fr
Application granted granted Critical
Publication of EP2251960B1 publication Critical patent/EP2251960B1/fr
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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K3/00—Details of windings
    • H02K3/46—Fastening of windings on the stator or rotor structure
    • H02K3/50—Fastening of winding heads, equalising connectors, or connections thereto
    • H02K3/505—Fastening of winding heads, equalising connectors, or connections thereto for large machine windings, e.g. bar windings
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K2203/00—Specific aspects not provided for in the other groups of this subclass relating to the windings
    • H02K2203/09—Machines characterised by wiring elements other than wires, e.g. bus rings, for connecting the winding terminations
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49002—Electrical device making
    • Y10T29/49009—Dynamoelectric machine

Definitions

  • the present invention relates to a winding head for an electric machine with rotor and stator, in particular an electric motor or a generator, preferably in a power plant. Furthermore, the invention relates to a method for mounting a winding head.
  • the stator has a stator winding, which is formed by a plurality of winding rods.
  • These winding bars which are generally designed as so-called Roebel bars, thereby extend in the axial direction in a stator core.
  • the winding bars are led out with their ends from the stator core.
  • the lead out coil end ends are bent and arranged in the radial and circumferential direction so that they form on the core end face a frustoconical or funnel-shaped end winding, the diameter of which increases with increasing distance from the core end face.
  • the stator winding of the electric machine is provided with a plurality of terminals to feed electrical energy into the stator winding and / or to be able to dissipate it from the stator winding, depending on whether the electric machine is configured as an electric motor or as a generator.
  • selected winding bars so-called phase winding bars, must be connected to these terminals.
  • phase connector rods so-called circular connectors, which each connect one of the phase winding rods in the region of the core end face to one of the connection terminals.
  • the phase connecting rods extend between their ends in the shape of a ring segment in the circumferential direction of the stator, being supported radially inwardly on one or more supports, usually in the form of supporting angles, which are distributed in the region of the core end side in the circumferential direction.
  • the round connectors are arranged and often attached to the support brackets.
  • several round connectors are located axially (with respect to the stator axis) one behind the other between axial stops of the support brackets.
  • spacers are arranged between adjacent circular connectors in the region of the supports, against which the circular connectors come to rest axially.
  • the dimensioning of the spacers is suitably adjusted so that there is an interference fit for the arranged between the axial stops round connector after mounting in the axial direction.
  • an effective fixation of the round connector is achieved at the support brackets, which is required due to the loads occurring during operation of the electrical machine.
  • the round connectors are provided on their outer side with an insulation, usually a synthetic resin. During curing of the resin and due to the heating and vibration occurring during operation of the electrical machines, settling phenomena can occur in which the insulations of the round connectors can yield slightly in the axial direction. As a result, the axial compression in the press fit between the axial stops of the supports decreases sharply, which can result in continuous operation of the respective machine that reduce the axial holding forces.
  • Such constructions and improvements in the design of the spacers and the holder of the round connector are for example from the DE 102004016454 known.
  • the EP 0 375 419 A2 describes a parallel conductor ring structure for a dynamoelectric machine. Strip connectors are mounted at certain locations about the axis of the stator core and connect the parallel conductive ring structures. Phase conductor extension means connect the terminals to the conductor rings.
  • the EP 1 279 838 A1 describes a method for making a permanent connection of two workpieces. Along a flat area holes are provided in a part in which pin-like elements are introduced with one end and fixed. Then the other part is placed with congruently arranged perforations over the ends of the pin-like elements and the flat areas are joined together. In addition, a hardening adhesive is injected into the holes.
  • the object of the invention is, inter alia, to provide an improved winding head for an electric machine, wherein the improvement is in particular to make the winding more stable and yet easy to install.
  • the invention is accordingly directed to a winding head for a stator of an electric machine, wherein the winding head comprises at least two circular connectors, via which the current is dissipated from the winding bars of the stator.
  • the winding head comprises a plurality of circular connectors, these being combined according to the number of phases corresponding to terminals.
  • the winding head additionally comprises a plurality of supporting angles, by means of which the winding head is fastened to the stator, the angles together with the round connectors form an actual supporting basket.
  • the round connectors typically have a radial section, at the end of each of which a phase connection block is arranged.
  • the phase connection block is typically a cube-shaped or block-shaped metal block in which the round connector is embedded.
  • At least two phase connection blocks of a phase are arranged next to each other in the winding head in the circumferential direction and according to the invention the adjacent phase connection blocks are further connected via at least one pin-shaped element which is at least partially cohesively secured in recesses in the mutually facing side surfaces of the phase connection blocks.
  • pin-shaped element there may be such a pin-shaped element, but it may also be arranged a plurality of parallel arranged such pin-shaped elements.
  • the parallel circular connectors and the corresponding flexible connections as far as possible to the bushings separated by the housing. Only directly when passing through the housing, the parallel paths are merged into a single.
  • there is one phase connection block for each circular connector but alternatively it is also possible to route two or more circular connectors to a single phase connection block.
  • Almost all of the circular connectors have a sufficiently long peripheral portion to be secured at least at one point to a support bracket. But there are also often one or a few circular connectors, which are attached for geometric reasons at no support bracket.
  • round connectors can be readily affixed such that between the last fixture and the end of the circular connector 50 cm -70 cm are not directly attached to the phase connection block, but are fixed only by spacers or connectors between the circular connectors , There are also round connectors, which are attached only at one point to a support bracket. These spacers or connecting elements, which may also be arranged at the radial portions just before the phase connecting blocks, are not well-defined and stable connections. This is typically the spacers, the connecting elements and the insulating material of the round connectors are typically materials that can yield under the action of heat. In particular, therefore, when the temperature rises during operation, the circular connector may not be sufficiently fixed in their spatial orientation.
  • the connecting pin is then rotatable and displaceable and accordingly it is possible in a first assembly phase to subsequently align the round connectors and to fix them in the final desired position as far as possible. Accordingly, it is also preferred if neither the inner surface of the recesses nor the cylindrical outer surface of the connecting pin have a thread. Only when this definitive orientation of the circular connector is reached and fixed, in a second step, the connection of the adjacent phase connection blocks is fixed by the cohesive connection is established. This is typically done so that a corresponding material (in the sense of an adhesive) is introduced.
  • a first preferred embodiment of the invention is characterized in that the pin-shaped element is designed as a connecting pin with a circular cylindrical outer surface, and the recesses are formed as cylindrical blind holes, and that the attachment of the connecting pin is substantially exclusively cohesively.
  • the connecting pin can also have (axial) grooves or projections in the peripheral surface, which optionally correspond to corresponding complementary structures in the inner surface of the recesses (key-lock principle).
  • the cross-sectional area of the connecting pin may accordingly be a circle, oval or other roundish shape, or else triangular, rectangular, square, hexagonal, or generally polygonal with the same or different side lengths, the corners may be rounded.
  • a further preferred embodiment is characterized in that the Winding head is designed for three phases and has three or six pairs of phase connection blocks, which are connected to each other via a pin-shaped element. There are preferably six pairs of phase connection blocks, and there are two pairs of phase connection blocks per phase, which are preferably arranged one behind the other in the axial direction.
  • the preferably circular-cylindrical pin-shaped element may have recesses and / or grooves, for example a plurality of star-shaped grooves, on the front side.
  • the grooves can be arranged equally or additionally in / on the interior of the recess. These grooves serve to receive the material for forming the integral connection and to moisten the largest possible surface with this.
  • the pin-shaped element is integrally formed. Further preferably, the pin-shaped element is based on a metallic or an insulating material or a combination of such materials.
  • the pin-shaped element may for example consist of ceramic or plastic or have a superficial coating of such a material, in particular it may consist entirely or partially of glass fiber reinforced plastic.
  • a preferred embodiment is characterized in that the pin-shaped element is designed as a connecting pin with a circular cylindrical outer surface, and the recesses are formed as cylindrical blind holes.
  • the outside diameter of the connecting pin is less than the inside diameter of the recess in the range of 0.01 mm - 2 mm, so that there is sufficient clearance, which is the above mentioned Alignment before generating the cohesive connection allows.
  • the recesses have a penetration depth for the connecting pin in the range of 5 mm - 40 mm, preferably in the range of 10 mm - 30 mm.
  • the connecting pin has a length in the range of 10 mm - 80 mm, preferably in the range of 20 mm - 50 mm.
  • the connecting pin has a diameter in the range of 5 mm - 60 mm, preferably in the range of 20 mm - 40 mm.
  • the recesses are formed as blind holes in the phase connection blocks, and that in the bottom region of the blind holes opens an externally accessible connection channel.
  • This connection channel makes it possible to introduce material from outside to produce the integral connection in the second assembly step.
  • the bottom portion has a receiving space in which the pin-shaped element, even if it is completely inserted into the recess, does not protrude.
  • This receiving space may for example be formed as a tapered portion on the bottom of the blind hole, but may also be in the form of grooves or other recesses.
  • the receiving space is used for receiving and / or distribution of the material for producing the cohesive connection and is particularly advantageous in combination with grooves and / or depressions in the connecting pin and / or the other walls of the recess.
  • the connection channel may, as further preferred, have means by means of which an insertion aid (for example a hose for injection) for the material for the material-locking attachment to the respective phase connection block for the attachment of the pin-shaped element can be attached.
  • the means may preferably be an internal thread arranged in the inner wall of the connection channel.
  • the pin-shaped element is preferably secured in the recesses with the aid of a hardening plastic material, wherein the hardening plastic material is preferably a cold or under The action of thermosetting epoxy resin is.
  • the radial sections of circular connectors guided in each case to adjacent phase connection blocks can be connected via at least one connecting element.
  • the connecting element may preferably be windings made of cords and / or strips, in particular preferably of glass-fiber-reinforced plastic material.
  • a further stabilization of the circular connector can be effected.
  • at least one connecting pin may be arranged, whose main axis is arranged substantially tangentially to the circumference of the stator.
  • the present invention relates to a method for mounting a winding head, as described above.
  • the method is preferably characterized in that a pin-shaped element is inserted into the recess of the first phase connection block, and that the recess of the second adjacent phase connection block is then pushed onto the protruding from the first phase connection block part of this pin-shaped element, that then arranged the circular connections aligned and fixed in their final spatial arrangement.
  • a connecting material for cohesive connection of the pin-shaped elements is introduced either before inserting the element into the recesses or attached to the element and then cured (preferably under the action of heat) and / or a bonding material for cohesive connection of the pin-shaped elements in the bottom of the preferably designed as blind holes recesses opening connecting channels.
  • the method is according to a further preferred embodiment, characterized in that the bottom portion of the blind holes has a receiving space in which the pin-shaped element does not protrude even in the fully inserted into the recess state, and that this receiving space and optionally in the pin-shaped element and / or in the Inner surface of the recess arranged grooves and / or depressions are filled with the bonding material substantially.
  • a plastic material preferably a curing plastic material, particularly preferably a cold-curing epoxy resin.
  • An electric machine comprises at least one stator and a rotatably mounted rotor therein.
  • the electric machine is an electric motor and / or a generator, in particular an alternating-current machine.
  • the electrical machines considered here are designed for relatively high powers and, accordingly, relatively large dimensions. A preferred application of such machines is, for example, in a power plant for power production.
  • the stator has a stator core and a stator winding.
  • This stator winding is constructed from a plurality of winding bars, which in the stator core in the axial direction, that is, for example, in FIG. 1 perpendicular to the plane of the drawing, and thus extend parallel to the axis of rotation of the rotor.
  • the winding rods which can be embodied in particular as Roebel rods, are in FIG. 1 not shown.
  • the winding rods are led out with their ends from the stator core.
  • the outgoing from the stator core ends of the winding bars are bent and arranged so that they form a winding head, not shown here on the core end face.
  • a winding head usually has the shape of a truncated cone widening with increasing axial distance from the core end face.
  • the winding rod ends are firmly connected to each other, whereby the winding head reacts with respect to radially from the outside inwardly acting pressure forces like a vault and can derive the forces occurring in the circumferential direction.
  • the stator winding is provided with a plurality of terminals or terminals 3, through which electrical energy can be introduced into the machine (in the case of an electric motor or in an electric motor operating state) or can be removed from the machine (in the case of a generator or in a generator operating state).
  • terminals or terminals 3 through which electrical energy can be introduced into the machine (in the case of an electric motor or in an electric motor operating state) or can be removed from the machine (in the case of a generator or in a generator operating state).
  • the three terminals 3 represent the three phases of the injected respectively decoupled current, typically called u, v, and w.
  • phase winding bars are each electrically conductively connected to one of the terminals 3.
  • phase winding bars there are twelve such phase winding bars that are tapped. This connection takes place in the region of the core end face, with the aid of circular connectors 1.
  • each shown a round connector 1 runs over a radial portion 10 (see FIG. 2 ).
  • Each of two phase connection blocks 6 for the same phase are arranged close to each other in the circumferential direction. In axially staggered with respect to the stator axis, two pairs of such phase connecting blocks are arranged, that is, there are a total of 12 phase connecting blocks 6 with only the front six in FIG. 1 are visible, and the rear six are hidden.
  • the round connectors 1 are formed, for example, as a waveguide, wherein the waveguide may have a circular, oval or otherwise rounded outer cross-section, but also square or polygonal such as rectangular outer cross-section.
  • the cavity in the interior can in turn be formed circular or angular, wherein a circular outer cross section may be combined with a square inner cross section.
  • the round connectors 1 Since the winding rods provided for connection to the connection terminals 3 are distributed along the core end side in the circumferential direction and the terminals 3 are expediently located in a limited circumferential segment for improved accessibility, the round connectors 1 have different dimensions in the circumferential direction in order to determine the different distances between the respective ones Winding bars and the terminals 3 to bridge. How out Fig. 1 clearly shows, therefore, have most of the round connector 1 between its ends a ring-segment-shaped shape and extend with respect to the axis of rotation 5 in the circumferential direction of the stator. In each of these connections follow radially outward usually flexible connections (fabric-like structures made of electrically conductive material), via which the electric current is then dissipated through passages through the housing. In this case, one or more such flexible connections can be present for each individual phase connection block 6. But it is also possible for the front or for the rear pair of phase connecting blocks 6 each provide only one flexible connection.
  • the two adjacently arranged phase connecting blocks 6 have two mutually facing side surfaces. In these side surfaces opposite holes are arranged resp. intended.
  • the holes are formed as cylindrical bores and have at the bottom in each case a conical recessed area 13.
  • In this conical recessed area opens in each case a connection channel 14, which is easily accessible from an exposed side surface of the phase connection block 6.
  • the connection channel 14 expands further towards the end and in this flared cylindrical region, an internal thread 15 is also provided.
  • the internal thread 15 is designed so that it allows a hose or a similar tool with an external thread for introducing a mass to produce a cohesive connection firmly connected.
  • a one-piece connecting pin 9 is now arranged, which is designed as a circular cylinder and whose axis is substantially tangent to the circumference of the stator.
  • the connecting pin 9 penetrates over a depth t of the bore in the respective phase connection block 6 in this. In between, typically a small distance remains in the range of 2 mm to 10 mm. That is, the two adjacent phase connecting blocks do not touch and preferably the entire length of the connecting pin 9 is greater than twice the penetration depth t, so that a minimum distance between the two blocks 6 is predetermined.
  • connection existing in this phase between the two phase connection blocks 6 is a connection with a certain play, that is to say the two blocks 6 can still be displaced relative to one another along the main axis of the connection element and to some extent also in other directions and the two phase connection blocks 6 can be rotated about the major axis of the connecting element against each other.
  • a putty is now injected through the two connection channels 14, this is preferably a cold-curing putty, for example based on an epoxy resin.
  • this is exactly in the relative orientation state that exists in the optimal orientation of the entire winding head.
  • the connecting pin 9 is formed as a simple circular cylinder. At the peripheral edge of a chamfer or bevel 16 is formed so that the pin 9 can be easily inserted into the recess 12.
  • the end face 18 of the circular cylinder is provided with radially arranged grooves 17.
  • the material for forming the integral connection and a large surface is provided for this integral connection.
  • FIG. 4 A further improved embodiment is shown below FIG. 4 shown.
  • a groove 20 which extends partially in the axial direction, in the peripheral surface.
  • This groove 20 makes it possible for the material not only to land in the recessed area 13, but also in the grooves 17 and additionally in the peripheral area of the connecting pin 9, in order to produce the integral connection.
  • analog groove-like recesses may be provided on the inner surface of the recesses, optionally in combination with those in Figs FIG. 4 shown grooves in the connecting pin, and possibly even in a coordinated manner to these.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Insulation, Fastening Of Motor, Generator Windings (AREA)
  • Windings For Motors And Generators (AREA)

Claims (15)

  1. Tête d'enroulement pour le stator d'une machine électrique, la tête d'enroulement comportant
    au moins deux raccords circulaires (1) par lesquels le courant est évacué des barreaux d'enroulement du stator ainsi que plusieurs coudes de soutien (2) par lesquels la tête d'enroulement est fixée sur le stator,
    au moins deux raccords circulaires (1) disposant d'une partie radiale (10) à chacune des extrémités de laquelle est disposé un bloc (6) de liaison de phase, au moins deux blocs (6) de liaison de phase d'une phase étant disposés l'un à côté de l'autre dans la direction périphérique,
    caractérisée en ce que
    les blocs (6) de liaison de phase voisins sont reliés au moins en partie en correspondance de matière par au moins un élément (9) en forme de tige qui est fixé dans des découpes (12) ménagées dans les surfaces latérales tournées l'une vers l'autre des blocs (6) de liaison de phase.
  2. Tête d'enroulement selon la revendication 1,
    caractérisée en ce que l'élément (9) en forme de tige est configuré comme tige de liaison à surface extérieure en cylindre circulaire, les découpes (12) étant configurées comme trous cylindriques aveugles et en ce que la fixation de l'élément (9) en forme de tige est essentiellement exclusivement en correspondance de matière.
  3. Tête d'enroulement selon l'une des revendications précédentes, caractérisée en ce que la tête d'enroulement est conçue pour trois phases et présente au moins trois paires de blocs (6) de liaison de phase qui sont reliées chaque fois par au moins un élément (9) en forme de tige, de préférence six paires de blocs (6) de liaison de phase étant prévues et par phase deux paires de blocs (6) de liaison de phase sont prévues et sont disposées de préférence l'une derrière l'autre dans la direction axiale.
  4. Tête d'enroulement selon l'une des revendications précédentes, caractérisée en ce que l'élément (9) en forme de tige présente sur son côté frontal (18) des creux et/ou des rainures, de préférence plusieurs rainures (17) en étoile, de préférence en combinaison et en liaison avec des creux et/ou rainures (20) disposés dans la surface périphérique (19) et qui présente de façon particulièrement préférable en partant du côté frontal et dans la direction axiale de l'élément (9) en forme de tige une longueur plus courte et de préférence plus courte d'au moins 2 mm à 5 mm que la profondeur (t) de la découpe (12).
  5. Tête d'enroulement selon l'une des revendications précédentes, caractérisée en ce que l'élément (9) en forme de tige est formé d'un seul tenant et est constitué d'un matériau métallique ou d'un matériau isolant.
  6. Tête d'enroulement selon l'une des revendications précédentes, caractérisée en ce que l'élément (9) en forme de tige est réalisé en matière synthétique et en particulier en matière synthétique renforcée de fibres de verre.
  7. Tête d'enroulement selon l'une des revendications précédentes, caractérisée en ce que l'élément (9) en forme de tige est configuré comme tige de liaison à surface extérieure cylindrique circulaire et les découpes (12) sont configurées comme trous cylindriques aveugles, le diamètre extérieur de la tige de liaison étant plus petit de l'ordre de 0,01 mm à 2 mm que le diamètre intérieur de la découpe (12), les découpes (12) présentant de préférence une profondeur de pénétration (t) de la tige de liaison de l'ordre de 5 mm à 40 mm et de préférence de l'ordre de 10 mm à 30 mm et/ou la tige de liaison (9) présente une longueur de l'ordre de 10 mm à 80 mm, de préférence de l'ordre de 20 mm à 50 mm et/ou un diamètre de l'ordre de 5 mm à 60 mm et de préférence de l'ordre de 20 mm à 40 mm.
  8. Tête d'enroulement selon l'une des revendications précédentes, caractérisée en ce que les découpes (12) sont configurées comme trous aveugles ménagés dans les bloc (6) de liaison de phase et en ce que au niveau du fond des trous aveugles (12) débouche un canal de raccordement (14) accessible de l'extérieur, le niveau du fond présentant un espace de réception (13) dans lequel l'élément (9) en forme de tige ne pénètre pas même lorsqu'il est enfoncé complètement dans la découpe (12) .
  9. Tête d'enroulement selon la revendication 8, caractérisée en ce que le canal de raccordement (14) dispose de moyens qui permettent de fixer un accessoire de placement du matériau de fixation en correspondance de matière sur le bloc (6) de liaison de phase concerné en vue de la fixation de l'élément (9) en forme de tige, les moyens étant de préférence un filetage intérieur (15) ménagé dans la paroi intérieure du canal de raccordement (14).
  10. Tête d'enroulement selon l'une des revendications précédentes, caractérisée en ce que l'élément (9) en forme de tige est fixé dans les découpes (12) en recourant à une matière synthétique durcissable, la matière synthétique durcissable étant de préférence une résine époxy durcissant à froid.
  11. Tête d'enroulement selon l'une des revendications précédentes, caractérisée en ce que les sections radiales (10) de raccord circulaire (1) amené à des blocs (6) de liaison de phase voisins sont reliées par au moins un élément de liaison (7), l'élément de liaison (7) étant de préférence formé d'enroulements de corde et/ou de ruban, de préférence en matière synthétique renforcée de fibres de verre.
  12. Tête d'enroulement selon l'une des revendications précédentes, caractérisée en ce qu'au moins une tige de liaison (9) dont l'axe principal est disposé essentiellement tangentiellement par rapport à la périphérie du stator est disposée pour relier deux blocs (6) de liaison de phase voisins.
  13. Procédé de montage d'une tête d'enroulement selon l'une des revendications précédentes, caractérisé en ce qu'un élément (9) en forme de tige est enfoncé dans la découpe (12) du premier bloc (6) de liaison de phase et en ce que la découpe (12) du deuxième bloc (6) de liaison de phase voisin est ensuite enfichée sur la partie de cet élément (9) en forme de tige qui déborde hors du premier bloc (6) de liaison de phase, en ce que les raccords circulaire (1) sont alignés et immobilisés dans leur agencement spatial final, un matériau de liaison qui assure la liaison en correspondance de matière des éléments (9) en forme de tige est inséré dans les découpes (12) avant l'insertion de l'élément (9) dans les découpes (12) ou placées sur l''élément (9) et/ou un matériau de liaison assurant la liaison en correspondance de matière des éléments (9) en forme de tige est introduit par l'intermédiaire de canaux de raccordement (14) qui débouchent au niveau du fond des découpes configurées de préférence comme trous aveugles (12) .
  14. Procédé selon la revendication 13, caractérisé en ce que le niveau du fond des trous aveugles (12) présente un espace de réception (13) dans lequel l'élément (9) en forme de tige ne déborde pas même lorsqu'il est complètement enfoncé dans la découpe (12) et en ce que cet espace de réception (13) ainsi que des rainures (17, 20) et/ou des creux éventuellement disposés dans l'élément (9) en forme de tige et/ou dans la surface intérieure de la découpe (12) sont essentiellement remplis par le matériau de liaison.
  15. Procédé selon l'une des revendications 13 ou 14, caractérisé en ce que le matériau de liaison est une matière synthétique, de préférence une matière synthétique durcissable et en particulier une résine époxy durcissant à froid.
EP10161638.1A 2009-05-13 2010-04-30 Tête de bobine pour une machine électrique et procédé de sa fabrication Active EP2251960B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102009021063A DE102009021063A1 (de) 2009-05-13 2009-05-13 Wickelkopf für eine elektrische Maschine und Verfahren zu dessen Herstellung

Publications (3)

Publication Number Publication Date
EP2251960A2 EP2251960A2 (fr) 2010-11-17
EP2251960A3 EP2251960A3 (fr) 2014-06-18
EP2251960B1 true EP2251960B1 (fr) 2018-06-13

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EP10161638.1A Active EP2251960B1 (fr) 2009-05-13 2010-04-30 Tête de bobine pour une machine électrique et procédé de sa fabrication

Country Status (4)

Country Link
US (1) US8339002B2 (fr)
EP (1) EP2251960B1 (fr)
CN (1) CN101888127B (fr)
DE (1) DE102009021063A1 (fr)

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CN110474460A (zh) * 2018-05-11 2019-11-19 舍弗勒技术股份两合公司 发卡式绕组和电机

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Also Published As

Publication number Publication date
CN101888127B (zh) 2015-07-22
CN101888127A (zh) 2010-11-17
EP2251960A2 (fr) 2010-11-17
US8339002B2 (en) 2012-12-25
EP2251960A3 (fr) 2014-06-18
US20100289355A1 (en) 2010-11-18
DE102009021063A1 (de) 2010-11-18

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